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A long-term study on the prevalence of shiga toxin-producing Escherichia coli (STEC) on four German cattle farms

Published online by Cambridge University Press:  02 September 2002

L. GEUE ,
M. SEGURA-ALVAREZ ,
F. J. CONRATHS ,
T. KUCZIUS ,
J. BOCKEMÜHL ,
H. KARCH  and
P. GALLIEN
L. GEUE
Affiliation:
Bundesforschungsanstalt für Viruskrankheiten der Tiere, Institut für epidemiologische Diagnostik, Seestr. 55, D-16868 Wusterhausen, Germany
M. SEGURA-ALVAREZ
Affiliation:
Bundesforschungsanstalt für Viruskrankheiten der Tiere, Institut für epidemiologische Diagnostik, Seestr. 55, D-16868 Wusterhausen, Germany
F. J. CONRATHS
Affiliation:
Bundesforschungsanstalt für Viruskrankheiten der Tiere, Institut für epidemiologische Diagnostik, Seestr. 55, D-16868 Wusterhausen, Germany
T. KUCZIUS
Affiliation:
Nationales Referenzzentrum für Enteritiserreger, Hygiene Institut Hamburg, Marckmannstr. 129a, D-20539 Hamburg, Germany
J. BOCKEMÜHL
Affiliation:
Nationales Referenzzentrum für Enteritiserreger, Hygiene Institut Hamburg, Marckmannstr. 129a, D-20539 Hamburg, Germany
H. KARCH
Affiliation:
Institut für Hygiene und Mikrobiologie der Universität Würzburg, Josef-Schneider-Str. 2, D-97080 Würzburg, Germany
P. GALLIEN
Affiliation:
Bundesinstitut für gesundheitlichen Verbraucherschutz und Veterinärmedizin, Jahnstr. 4, D-06846 Dessau, Germany
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Abstract

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The occurrence of Shiga toxin-producing Escherichia coli (STEC) was studied on four cattle farms. STEC were detected in 29–82% of the cattle. STEC with additional EHEC markers were detected on all farms. The occurrence of the complete virulence marker pattern (stx1 and/or stx2, eae, EHEChlyA, katP, espP) was correlated with the presence of known STEC serotypes. STEC O26[ratio ]H11 and O165[ratio ]H25 with the complete pattern of virulence markers were the most prevalent. STEC O157 (H7/H-) STEC O103[ratio ]H2 and STEC O145[ratio ]H- were found sporadically. Five clonal subgroups of the STEC O26[ratio ]H11 isolates were identified by pulsed-field gel electrophoresis. STEC O26[ratio ]H11 were present in three groups of cattle. This serotype was detected in a single group over the entire fattening period. Most STEC O26[ratio ]H11 with the complete pattern of potential virulence markers were found in clinically healthy cattle. These animals may represent a risk factor for farmers and consumers.

Type
Research Article
Information
Epidemiology & Infection , Volume 129 , Issue 1 , August 2002 , pp. 173 - 185
Copyright
© 2002 Cambridge University Press